both are viable options....if you have a laptop that reads/writes sd cards, a card reader would probably be easiest way to go. You can find them on ebay for ~$60. Zip drives are dirt cheap but you'll need zip disks and a usb zip drive to use them with a computer.
Sorta pricey but thought you should have a look at this.
http://www.ipcas.com/products/usb-floppy-emulator-fdd-to-udd.html